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The role of cochlear resident macrophages in age-related hearing loss

Research Project

Project/Area Number 19K09908
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56050:Otorhinolaryngology-related
Research InstitutionKyoto University

Principal Investigator

OKANO Takayuki  京都大学, 医学研究科, 講師 (60642931)

Co-Investigator(Kenkyū-buntansha) 西村 幸司  滋賀県立総合病院(研究所), その他部局等, 嘱託研究員 (20405765)
山本 典生  京都大学, 医学研究科, 准教授 (70378644)
Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords加齢性難聴 / 内耳性難聴 / 免疫 / 組織マクロファージ / 内耳 / 免疫学 / Csf1r伝達系 / 蝸牛 / 骨形成
Outline of Research at the Start

加齢性難聴の病態におけるマクロファージの役割およびマクロファージの維持に必須とされるCsf1伝達系の役割について、特に聴覚の一次ニューロンであるラセン神経節神経細胞や神経の支持的役割を果たすシュワン細胞・ 衛星細胞との相互作用に着目し検討することで、加齢性難聴に対する蝸牛組織マクロファージを標的とした新規治療法の開発につなげることを目的とする。
予想される成果として、加齢性難聴の進行の予防法や新規の治療法の開発に結びつけられることが挙げられ、この点は現代の社会の要請に応えうるものである。本研究成果の発展により加齢性難聴の予防・治療が実現すれば、来る超高齢社会の生活の質(QOL)の向上につながる。

Outline of Final Research Achievements

For the purpose of development of novel therapies for hearing loss that target macrophages in the inner ear, there is a need to elucidate their tissue of origin and dynamics. Analysis of the Csf1 signaling pathway in age-related hearing loss suggests that Csf1 signaling is important not only for inner ear bone formation, but also for the maintenance of resident macrophages in the spiral ligament and stria vascularis in adult mouse cochlea. In addition, it was suggested that resident macrophages in the mouse inner ear are supplied and replaced by fetal liver and bone marrow after birth, and that the tissue from which macrophages originate migrates from the yolk sac, fetal liver, or bone marrow. This study provides basic knowledge for the development of therapies targeting resident macrophages in the inner ear to prevent and treat age-related hearing loss in the future.

Academic Significance and Societal Importance of the Research Achievements

蝸牛の組織マクロファージは、内耳の恒常性を維持し、内耳の損傷に続いて免疫学的に最前線で防御機構の一部として役割を担うと考えられている。ただし蝸牛組織マクロファージの役割の詳細は知られておらず、今後内耳のマクロファージを標的とした難聴に対する新規治療を開発するにあたり、基盤となる知識としてその由来組織や動態を解明することが求められている。
本研究の実施により、今後の増加の一途を辿る加齢性難聴を予防、治療を見据えて、骨髄由来の内耳組織マクロファージを標的とした新たな治療法を模索するための基礎的な知見が得られた。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (4 results)

All 2022 2021 2019

All Journal Article (4 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results)

  • [Journal Article] Role of Inner Ear Macrophages and Autoimmune/Autoinflammatory Mechanisms in the Pathophysiology of Inner Ear Disease2022

    • Author(s)
      Miwa Toru、Okano Takayuki
    • Journal Title

      Frontiers in Neurology

      Volume: 13

    • DOI

      10.3389/fneur.2022.861992

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Prognosis of otitis media with effusion in pediatric patients with cleft palate during language-acquisition period treated by simultaneous tympanostomy tube placement with palatoplasty2022

    • Author(s)
      Iemura-Kashiwagi Maho、Okano Takayuki、Iwai Noriko、Taniguchi Mirei、Omori Koichi
    • Journal Title

      International Journal of Pediatric Otorhinolaryngology

      Volume: 155 Pages: 111071-111071

    • DOI

      10.1016/j.ijporl.2022.111071

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Multicenter phase III trial of regenerative treatment for chronic tympanic membrane perforation2021

    • Author(s)
      Kanemaru Shin-ichi、Kanai Rie、Omori Koichi、Yamamoto Norio、Okano Takayuki、Kishimoto Ippei、Ogawa Kaoru、Kanzaki Sho、Fujioka Masato、Oishi Naoki、Naito Yasushi、Kakehata Seiji、Nakamura Hajime、Yamada Shinobu、Omae Kaoru、Kawamoto Atsuhiko、Fukushima Masanori
    • Journal Title

      Auris Nasus Larynx

      Volume: online ahead of prin Issue: 6 Pages: 1054-1060

    • DOI

      10.1016/j.anl.2021.02.007

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Csf1 Signaling Regulates Maintenance of Resident Macrophages and Bone Formation in the Mouse Cochlea2019

    • Author(s)
      Okano Takayuki、Kishimoto Ippei
    • Journal Title

      Frontiers in Neurology

      Volume: 10 Pages: 1244-1244

    • DOI

      10.3389/fneur.2019.01244

    • NAID

      120007142254

    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2024-01-30  

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